Mathematics: Post your doubts here!

[GorgeousEyes]

anyone???

4(x/k+k)-x^2
4x/k +4k -x^2
4x-4k^2-kx^2
4^2-4x-kx4 --. b^2 -4ac
16+16k =o
16=-16k
-1=k

 

[GorgeousEyes]

32 + 80u + 80u^2

u = x+x^2 ..

32+ 80(x+x^2) + 80(x+x^2)^2
32+80x+80x^2 + 80(x^2+2x^3+x^4)
32+80x+80x^2+80x^2+160x^3+80x^4
160x^2
160 coeffiecent.

Thank you

 

[sma786]

formula of unit vector? -.-

 

[Rutzaba]

formula of unit vector? -.-

take a direction vector and divide it by its modulus

 

[PANDA-]

around 60 or so .. but the 2012 ones were quite a disaster .. one of them went for 48

Welcome to the club

Mine is around 60 as well, but the recent papers ... well.

 

[syed1995]

Welcome to the club

Mine is around 60 as well, but the recent papers ... well.

If a paper like this 2012 comes.. then securing an A would be very very difficult. I also have S1 this year.. If i had M1 it would have been easier for me :\

 

[PANDA-]

If a paper like this 2012 comes.. then securing an A would be very very difficult. I also have S1 this year.. If i had M1 it would have been easier for me :\

M1 is quite easy... But it accounts for very little percentage

 

[syed1995]

M1 is quite easy... But it accounts for very little percentage

not really... M1 and S1 both account for equal amounts.. about 20% each.. and P1/P3 around 30% each...

 

[~`Heba`~ :)]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_11.pdf #11 how do i know the range? I got it Y>or equal 2 , but how do i know it's less than or equal to 10?

 

[sweetiepie]

Compound Interest Plz Some One Help Me Its Not In Alevels But Need It For My Sis

Q1. Calculate Compound Interest earned for Rs 5000 invested for 6 years at the rate of 7 % per annum?

Q2. In How Many years a sum of Rs 3000 would amount Rs 4814.07 at 6% compound semi – annually?

Q3. If Rs 300 are deposited at the beginning of each quarter in an account which earns interest rate of 8% compounded quarterly, what will be the amount after the
end of 3 and half years?

Q4. In How Many years a sum of Rs 3000 would amount Rs 6130.43 at 6% compounded quarterly?

Q5. Khalid Mahmud borrowed Rs 2500 from Sultan for 3 and half years at simple at 8% per annum. How Much Khalid Mahmud has to pay at the end of the period

Q6. What Is the Interest on Rs.1880.90 for one year @ 5 and half %?

Q7. Find the Compound Interest of Principal amount Rs 50,000 at the rate of 5% for 3 (3/4) years?

Q8. Mr. X wishes to save money to take a trip. If He deposits Rs 150 at the end of each month 24 months in an investment that pays 12% compounded monthly, how much will he have on deposit?

Q9. Mr. Y wants to accumulate Rs. 6000 in 8 years. He makes equal deposits at the end of each 5 months in an account. The rate of Interest is 8% compounded semi-annually. Find the value of each deposit?

Q10. Find the amount of Rs. 250 invested at the end of each of 5 successive years at 6% interest compounded annually?

Plz Answer With All Steps

 

[~`Heba`~ :)]

and please in nov11 #2 how do i know the number of roots for the equation without drawing the graph? http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_11.pdf

 

[gary221]

Rutzaba... sorry 4 disturbing... ... bt i need help!!!
http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_s07_ms_3.pdf
http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_s07_qp_3.pdf

ques 1... pls!!
thnx!!

 

[GorgeousEyes]

please june08 no.8 .

 

[PANDA-]

Less than 36 hours left for exam time.

 

[Amaryllis]

can anyone please help me http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_12.pdf Q 9 i

and Q 5 i and q 7 part i http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w08_qp_1.pdf

 

[shafayat]

can anyone please help me http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_12.pdf Q 9 i

and Q 5 i and q 7 part i http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w08_qp_1.pdf

for q 9 i ..
U can quickly sketch a graph or easier method is you make a table and substitute x values for y values !! The then write
Smaller value<X<larger value
In the table use values like 0,45,90,135,180 , if u want and have time u can do till 360 degrees also

 

[shafayat]

and please in nov11 #2 how do i know the number of roots for the equation without drawing the graph? http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_11.pdf

For the first part you HAVE to sketch .. The. State the number of solutions .. Let's say 2
So then you check the other question it says upto 20pie but u have till 0-2pie .. So u consider o-2pie as one revolution and then count number of revolutions u need .. Till 20 pie it will be around 10 maybe .. And u have for one resolution 2 solutions so for 10 resolutions .. Just multiply

 

[shafayat]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_11.pdf #11 how do i know the range? I got it Y>or equal 2 , but how do i know it's less than or equal to 10?

This is simple ..
Just substitute both the domain .. Write in this format
Smaller value<f(X)<larger value

 

[Muhammad Arham Ayaz Malik]

Maths is easy guys , what you have prepared by own its good
Dont study one day before
Take a chill pill enjoy the time , dont take tension else trust me
You will ruin your grade

 

[Manobilly]

A day left!